Fatigue behaviour of toe and root stiffener cracks in stiffener-to-deck plate weld of orthotropic bridge decks

Fatigue cracks in the stiffener-to-deck plate connections of orthotropic bridge decks, initiating from the weld toe or root and propagating into the stiffener or weld throat, are experimentally and numerically studied. A statistical analysis of the structural stress is carried out using the experimental data. Automatic welded specimens show a...

Fatigue behaviour of root crack in stiffener-to-deck plate weld at crossbeam of orthotropic bridge decks

Steel Orthotropic Bridge Decks (OBDs) are widely used in long-span and movable bridges. Fatigue resistance analysis plays an important role in the design or assessment of OBDs. One possible fatigue failure is the crack initiating from the weld root of stiffener-to-deck plate connections at crossbeams. A full-scale experimental investigation...

Large Scale Calibration of Agent-Based Models in Social Systems with Sensitive Data

Fatigue resistance of rib to deck, crossbeam to deck and deck to deck welds in orthotropic decks using structural stress

This study derives the fatigue resistance of welded details in orthotropic decks using structural stress (hot-spot stress where possible) based on tests described in literature and tests by the authors. The data are supported with linear elastic fracture mechanics simulations. Details covered are the rib to deck weld, the crossbeam to deck...

TIG-dressing of High Strength Butt Welded Connection. Part 2: Physical Testing and Modelling

Weld improvement techniques are aimed at reducing the notch effects of welds and generally focus on two aspects: a change of geometry of the weld toe and a change of the weld residual stresses. In this paper, fatigue tests are discussed, performed on butt welded specimens in steel grades ranging from S460 to S1100 in the TIG-dressed condition....

TIG-dressing of High Strength Steel Butt Welded Connections. Part 1: Weld Toe Geometry and Local Hardness

This paper presents the results of extensive measurements on weld toe geometry of as-welded and TIG-dressed butt welded connections in high strength steels S460, S690 and very high strength steels S890 and S1100. Descriptions of the measurement techniques and data analysis are presented. Four weld toe parameters have been formulated to...

Effect van thermisch gespoten deklaag AI of Zn/AI 85/15 op scheurdetectie: Natte kunstwerken

Classificatie Dekplaat en Cut-out Fase 1: Evaluatie bestaande proeven en berekeningen en spanningsbepaling

Fatigue strength of welded connections made of very high strength cast and rolled steels

Although Very High Strength Steels (VHSS) with nominal strengths up to 1100 MPa have been available on the market for many years, the use of these steels in the civil engineering industry is still uncommon. The main objective of the research is the determination of the fatigue strength of welded connections made of VHSS. The research comprised...

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Meetbare geluidseisen en geluidsarme oplossingen voor enkelvoudige voegovergangen

Turning contaminated mud into a road base material

Training van gevechtsvliegers: De rol van simulatie

First, the present training curriculum is described, including the use of simulation and simulators. The possibilities to improve training through the increased use of simulation are discussed. The question whether simulation can replace live training is addressed. The paper concluded that simulation is a force multiplier w.r.t. training,...

Trends in airlines flight deck design

This report gives an overview of the development of the airliner structure, engines and systems, and the impact on the cockpit design. The influence of the developments of micro-electronics, digital computer technology and display technology on the avionics design and cockpit lay-out of the recently introduced airliners as the Airbus A-310 is...